I really enjoy my CamelBak Peak Bagger, 2000 cu. in. I use it for every outdoor activity I do, even hauling laptop and supplies when I bike to work. I used it one time on a 3-night JMT backpack in Yosemite, too.
I can't find any CamelBak with that much capacity now, but the 2010 Alpine Explorer is close at 1950 cu. in. Unfortunately they have lost the outside mesh side pockets that I sure find handy now and then.
It looks like you can find CamelBak over-nighter "Vantage" series packs designed in 2008 still on sale that are around 2000 cu in and larger.
CamelBak makes dozens of packs now, but I wouldn't trade my Peak Bagger for any of them.
